216297347 has 4 divisors (see below), whose sum is σ = 247196976. Its totient is φ = 185397720.

The previous prime is 216297331. The next prime is 216297391. The reversal of 216297347 is 743792612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216297347 - 2⁴ = 216297331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216297317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15449804 + ... + 15449817.

It is an arithmetic number, because the mean of its divisors is an integer number (61799244).

Almost surely, 2^216297347 is an apocalyptic number.

216297347 is a deficient number, since it is larger than the sum of its proper divisors (30899629).

216297347 is an equidigital number, since it uses as much as digits as its factorization.

216297347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30899628.

The product of its digits is 127008, while the sum is 41.

The square root of 216297347 is about 14707.0509280413. The cubic root of 216297347 is about 600.2751950565.

The spelling of 216297347 in words is "two hundred sixteen million, two hundred ninety-seven thousand, three hundred forty-seven".